Machine for hobbing or cutting gears



July 17, 1928.

C. H. SCHURR MACHINE FOR HOBBING OR CUTTING GEARS original Filed Dec.f7', 1925 '7 sheets-sheet.

July 17, 1928.'

C. H. SCHURR MACHINE FOR HOBBI-NG OR CUTTING GEARS Original Filed Dec.'7, 1923 '7 Sheets-Sheet 2 @Hawa July 17, 1928. 1,677,853

C. H. SCHURR MACHINE FOR HOBBING OR CUTTING GEARS Original Filed Dec.'7, 1925 '7 Sheets-Sheet 5 TEG. 5.

311 ucnl'oz July 17, 1928.

C. H. SCHURR MACHINE FOR HOBBING OR CUTTING GEARS Original Filed Dec. 7,1923 '7 Sheelzs-Sheeffl 4 2 m a. U h U H @A Q m H C N .w nu H m qm S 2:vw ha July 17, 1928.

C. H. SCHURR MACHINE FOR HOBBING OR CUTTING GEARS original Filed Deo. 7,1923 #sheets-sheet 5 July 17, 1928.

C. H. SCHURR MACHINE FOR HOBBING OR CUTTING GEARS Original Filed Dec.'7, 1923 7 Sheets-Sheet 6 July 17, 192s.

1,677,853 C. H. SCHURR MACHINE FOR HOBBING OR CUTTING GEARS OriginalFiled Dec. '7, 1923 '7 Sheets-Sheet 7 @nvm/1to1,

Patented IJuly 17, 1928.

UNITED STATES PATENT oFFlcE.-

CHARLES H. sCHU'RR, 0E CLEVELAND, CHIo, AssIGNon To THE LEES-EEADNEECoM- PANY, E CLEVELAND, oHIo, A CoEPoEA'rToN or oHIo.

MACHINE FOR HOBBIN G OR CUTTING GlEARS.

Continuation of application Serial No.

This invention relates to a machine' for f bobbing gears.

This application is in continuation of the subject matter of my priorapplication, Serial No. 67 9,127 liled December 7, 1923.

One object of the invention is to provide an improved mechanism forfeeding the work in either direction.

`Another object of the invention is to prolo vide relatively simplemeans for rotating the tool and work-piece in correlation to each other.A

Another object of the invention is to construct an improved mounting forthe tool, v whereby it may be adjusted to different operative positions.

A further object of the invention is to provide an improved constructionof frame and supports for the tool and the work- 2o piece adapted tomaintain themA in a fixed relation during operation of the tool, wherebygreater accuracy in the teeth of gears result and a relatively largeamount of metal may be removed during cutting.

Other objects of the invention will be apparent to those skilled in the,art to which my invention relates from the following de# scription takenin connection with the accompanying drawings, wherein Fig, l is a frontelevation of a machine for liobbing gears embodying my invention. Fig.1a is a fragmentary section on the line 11--1a of Fig. 1. 'i

Fig. 2 is an elevational view from posite side of the machine.

Fig. ,3 is a section on the line 3 3 of F ig. 6.

Fig. 4 is a section on the linea-4 of 2. Fig. 4 is a fragmentary sectionon the line LTU-4a of Fig. 4.

Fig. is an en d view of the machine, with the cover for'r'the changegear casing removed. Fig. 5a is a seetion'on the line 5"*-5'1l o f Fig.46 is a longitudinal sectional view on the line 6-6 of Fig. 5. `I `ig.=7.is arsectionlpnthe line 7-7 of 50 Fig. 6. f

In' the drawings, 1y indicates a frame preferably comprising a mainsection Rand base lc 679,127, led December 7, 1923. Tlis applicationfiled July 22, 1924. Serial No. 727,421.

- l", may be cast or otherwise formed to provide supports and enclosingportions ,for various elements of the machine, and spaced beds la', 1b',respectively `(Figs. l and 2). The Inaln section lais shaped to provideaV to support the supplemental section l", which is rigidly secured tothe base section by suitable bolts 1 (see Fig. 7). 2

indicates a frame member having depending side walls 2n and dependingstandards 3 engaging the beds la', 1b', respectively, and rigidlysecured thereto in any desired manner, but preferably by a plurality ofcap screws 2a fitting openings 'formed in the vsupporting beds la', 1b',and in inturned flanges 2b provided on the lower ends of the side walls2iL and standards 3 of the member 2 (Fig. 3). The member 2 comprises acasting preferably of arch shape in cross section extending from end toend of the frame 1. The space between each side wall 2l and adjacentstandard 34 of the arched member eX- poses and permits access to a tool4 and a Work blank or rblanks A, A, to which reference will later bemade. -As shown in the drawings, the arched member 2 is disposed aboveand is supported by and secured to the frame l along its sides and atits front end by the side walls 2a and standards 3. It will therefore beseenvthat the arched member 2 extends beyond the tool 4 and blanks A, A,to the front end of the frame 1 and, in (zo-operation with the bed 1h',serves ,to rigidly support the slide, which supports the blanks A, A, aswill later be described.

Themain frame l comprising sections 1a and 1l1 and the frame member 2,its walls 2 and standards 3 would in practice all be formed integrally,in. one piece, for the sake pieces are so secured together that they arestructurally integral, and in function and effeet are equivalent toan-integral or a sinf gle piece frame. The maximum of strength andrigidity so important in machines of -this class, as will be described',has not here-` f tofore been obtained lbecause theparts of the" framerelied upon to resist -deflection have been adjustably connectedtogether or have been relatively movable etc.

5, 5, indicate guides provided on the upper surface of the frame 1 andunder surface of the arched member 2, respectively, and arranged toslidably support a slide 6, whereby the latter may be fed in alongitudinal direction, to feed the blank or blanks to the tool 4. 5indicates a gib interposed between one guide face of the slide and theadjacentfguide 5. The slide 6 is provided with a body portion 6L inwhich is formed an opening 6" for a bushing 6, an annular member 6l andan extension 6". 'lhe bushing 6 forms a bearing opening for a spindle 7,which carries, the blank or blanks A, A. The bushing 6 is preferablytapered (see Figs. 5 and 6), so that the Spindle 7, which also has atapered portion, may engage therewith and be held against endwisemovement in one direction. rlhe inner end of the bushing 6 is preferablyflanged to form a shoulder which engages with the end wall of the bodyportion 6. rllhe spindle 7 preferably comprises a sleeve 7L1 having atapered portion (already referred to)` fitting the tapered bushing 6 anda flange or collar 7 b that is adapted to engage the `inner end of thebushing 6, and a section 7 removably connected to the sleeve 7. Theconnection between the sections 7 and 7 may be provided by making theinner wall of the sleeve and the inner end of the section 7 of conicalshape and then forcing the latter into the sleeve. This latter operationis accomplished by means of a rod 8 extending through the sleeve andhaving screw threaded connection with the inner end of the spindlesection 7, as shown in Fig. 6. The outer end of the rod 8 is providedwith a head 8 which engages a block or cap 9 fitting into the outer endof the sleeve 7. By

rotating` the rod, the spindle section 7 will be forced into the sleeveand removably fixed thereto. The head 8a is shaped to receive a suitabletool, whereby it may be rotated. The spindle section 7 isshaped to forman arbor for the blanks A, A, and a shoulder against which the blanksare clamped by one or more nuts engaging screw threads provided on theouter end or free end of the spindle section 7. 41() indicates a plateengaging with and rigidly secured to the outer end of the annular member6d of the slide 6. The inner face of the plate l() is provided with anannular rib 10 to form a seat to engage the inner wall of the annularmember 6l. 'lhe plate 10 is formed with the opening 11 which forms abearing for the outer end of the sleeve 7. The sleeve 7 is provided withscrew threads to receive a nut 12, which may be tightened against theplate 1() or the flange of a bushing 10 fitting the opening 11. A washer12 may i. its seat 13.

be interposed between the nut 12 andthe flange of the bushing. ment ofthe nut l2, the latter will co-operate with the collar 7h to preventendwise movement of the spindle in either direction. Between the taperedportion of the sleeve 7 and the bearing portion which rotates in theopening 1l, the sleeve is provided with a conical wall 13, which forms aseat for a similarly shaped hub 14 of a gear 15, and a screw threadedportion 13, the latter being provided for the purpose of taking a nut16, which is clamped or tightened against the gear hub 14 to secure thegear in position on The gear is keyed to the sleeve \7 in any desiredmanner, so as to drive it.

17 indicates a pair of guides provided on the extension 6 of the slide6. 18 indicates a su-pporting member slidably engaging the guides 17. Asshown in Fig. 4, the supporting member 18 is provided with flangedelen'ients 18a which engage the guide walls ot' the guide and thussupport the supporting member on the extension 6. The flanged elementsare secured to the supporting member 18 by suitable cap screws. Thesupporting member 18 is preferably clamped in any position of adjustmentby a clamping means indicated 'as an entirety at 19. Of these clampingmeans, 19 indicates a tube or sleeve supported in an opening 19 formedin the upper surface of the extension 6. The tube 1.9n extends upwardlythrough an opening formed in the arched member 2, such opening beingelongated (see Fig. 6) to permit movement of the tubewith the extension6 as the slide 6 is fed relative to the tool 4. 19b indicates a T-shapedslot formed in and extending longitudinally of the supporting member 18.19 indicates a T- shaped key fitting the T-shaped slot 19". 19lindicates a rod rotatably supported in the tube 19l and provided atitslower end with screw threads which engage a vscrew threaded openingformed in the T-.f-haped key 19. rlhe upper end of the rod 19d isprovided with an enlarged portion, such as a head, which engages withthe upper end of the tube so that when the rod is rotated it willoperate to draw the key upwardly and thus act through the supportingmember 18 to clamp the latter against the extension 6. The rod 19 may beoperated by a handle 20. The supporting member 18 is provided with adepending arm 21 which carries on its lower en d an arc shaped bearingmember 21 with which the free end of the spindle 7 may engage, to resistthe pressure of the spindle incident to the operation of the tool 4while cutting a. blank A.

It will be understood that when`the blank or work piece A is fed to thetool 4 the blank will tend to move away from the tooll and will exert athrust, the resultant direction of which is in general toward the arch.From By proper adjustthe foregoing description it'will be seen" that thefree end of the work spindle or that end thereof which carries the work,is supported by the supporting member 18, and the latter in turn issupported by the arch member 2. As the forward end of this arch member 2is supported by and connected to theframe at al point beyond the freee'd of the work spindle, I am enabled to provide a, structure whichrigidly resists thelateral strains upon the work spindle incident to thecutting operation. I have found that by 'making the frame .with an archto takethe-.thrust of the work pieceas described and byI-formingthisarch in effect in onepiece with the main frame, there is practicallynodeflection of the work spindle, and 'greater accuracy in cutting isattained and Amore met-al may be removed during each cnt as com pared tootherl machines .of which I have knowledge.

22 indicates aI knee or supporting device for a head 23 on which thetool 4 is supported. The knee 22 comprises a platform '22, dependingspaced walls 22b`whieh have a sliding engagement with walls24, thatdeiine a space 1n the supplemental casting l" to receive the knee 22,and transverses webs 22C, 22, the latter serving as an incline withwhich a wedge,indicated as an entirety 25,

engages to raise and lower the knee 22 as will be later described. Thatside wall of the casting 1a which extends upwardly from the base section1c (see Figs. 1 and 6) preferably serves as a. guide for the inner enwall of the knee 22 as it moves upwardly and downwardly and also as itake the thrust of the knee incident tothe operation of the wedge 25. Asshown in Figs. 6 and 7, the base 1c is formed withirecesses 26 toprovideunobstructed spaces for the lower ends of spaced walls 221 whenthe knee is adjusted downwardly and the walls of the casting 1 areshaped or fashioned to form an opening 25 to receive the wedge 25.

when moved outwardly. The headk23, and platform. 22"l are formed withrecesses and conduits, so that the cutting oil may be freely conveyed tosome desirable point for discharge or repumping back to the tool.

27 indicates a rib adapted to serve as a guide for the wedge 25. The rib27 is preferably of T-shape in cross section and secured to ,the base 1cbetween the recesses 26,

being secured to the base by cap screws 28 (Fig. 7). Therbottom wall ofthe wedge 25 is formed with a longitudinally extending recess or slot 29of T-shape in cross section to 'receive' the guide rib 27 and thus guidethe wedge in its movements to adjust or move the knee 22 vertically. Toinsure movement of the knee 22 in both directions, the inclined face258L of the wedge extends laterally beyond the side walls thereof, asshown at 30, and such lateral extensions lit an abutment to,

into inclined grooves or guide ways 31 formed in theopposingfaces of thewalls 221. As will be nderstbod from the foregoing description, theinclined face 25a of the wedge, when moved towards the left, as viewedin Fig. 6, Will engage the web 22ul and vmove the knee upwardly; whenthe wedge is' moved inthe opposite direction the laterally extendingwalls 30 will engage the lower facesvof the grooves 31 and thus move theknee 22 downwardly.

By preference rthe. inclined face 25 and the opposing faeeof. the web22,i are pro- 4vided with interengaging) )caring faces to facilitate theengagement the Wedge With the knee, and the relative sliding movementtherebetween without .undue friction.

32indicates as an entirety-means for moving the wedge 25 in oppositedirections. Of these means, 32a indicates a nut mounted in an openingV33 formed in the body portion of the wedge 25. The nut 32a has a flange4ment of the screw 35 it is'p'rovided intermediate its ends with a collar35', whichacts against the inner face of the plate 36 to 'ypreventmovement of the screw endwise outwardly and atits outer Kend thescrew 35 is provided with screw threads to receive one or more nuts 35"-which may beadjusted or 'tightened so as to engage the outer face of theplate 36 and thus co-operate with the collar 35u to prevent endwisemovement of `the screw inwardly while permitting it to rotate in itsbearing. 37 indicates a gear interposed between the plate 36 or aninwardly extending hollow boss 37n provided thereon, such gear beingkeyed to the screwso 'as to operate the latter when it is driven.

38 indicates a shaft rotatably mountedv in and securing e latter incollarl 35a andthe shaft and engagingv the/hub t 37; 40. indicates a i`126 by means of ahead 41 c engagement with the flange of a bushing 38 fwhich is mounted rotating the wheel 40 in screw 35 will be. operated andthelatterin turnyacting through the nut 32, will move in the opening38a. -Byff either direction, the

shaft end by one or more nu accordance with the desired the framethrough the depending the wedge in one direction or the other, accordingto the direction of rotation of the wheel 40. y

43 indicates an entirety, an automatic stop mechanism, engaging with thewheel to limit its rotation, and through it the adjustment of the wedge25. This stopI mechanism may be of any desired construction, but sinceit forms no part of the invention herein involved, it is thoughtunnecessary to describe the same in detail.

It will be understood\that the wedge i-s adjusted by the operating means32 to move the knee 22 upwardly or downwardly so as to support the tool4 in proper position in depth of cut, dependant upon the diameter of theblank or work-piece to be operated upon.-

When the wedge is moved and the knee thereby positioned to hold the toolin worki with the work piece, the inclined plane construction of thewedge and knee enable great pressure to be applied by the tool againstthe work piece. Furthermore, the knee being held against lateralmovement by the rigid knee guides and against longitudinal movement awayfromV the work piece by the rigid Wedge, the tool is forcibly andunyieldingly maintained. in Working engagement with the work piece. Tocorrespond, the work: piece is rigidly and unyielding held againstmovement away from the tool by transferring the resulting thrust of thework piece to the rigid arch of arm 21. The construction is madeadditionally rigid to further aid in preventing yielding of the workIpiece. under the pressure of the work tool by arranging the upper guideof the slide to lie directly in the line of this thrust of the workpiece.

The head 23 comprises a supporting element 23a having a lateralextension 23" (see Fig. 7) carrying a housing 44, that encloses a wormgear 45 meshing with and driven by a. worm 46 (Fig. 4), to whichreference will later be made. rlhe housing 44 is provided ing engagementkwith oppositely 'extending lannular walls, which terminate in annularcollars,

44a, 44", disposed substantially concentric with the axis of the wormgear 45, and adapted to support the opposite ends lof a'shaft or spindle47. The shaft 47 is keyed to the worin gear 45 and driven thereby. rTheshaft 47, at its outer end, extends beyond the collar 44 and carries asuitable flywheel 48, the latter being held in position on the ts 48a.The housing 44 and collar 44b are preferably formedV separately, thelatter being secured to the houslng in any well known manner.y

The inner end of the shaft 47 is formed vwith a conical shaped openingwhich removably receives the inner conical shaped end of an arbor 4a onwhich the tool 4 is a iange 58 of a collar 58 mounted. The opposite endof the arbor 4 is rotatably mounted in a supporting element 4b, the baseportion 4b of which is provided with guides engaging ways 23a (seeFig. 1) formed in the head supporting element 23a. The base portion 4bofl the supporting element 4" may be clamped in any position ofadjustment along the ways 23a by bolts 49 (Fig. 4a) engaging a wedge 50,the face of which is arranged to engage one wall of one way 23a and thusclamp the base portion in posit-ion (Fig. l). By loosening the bolts 49the supporting element 4l may be slid or moved outwardly out ofengagement with the outer end of the arbor 4a and thus permit the latterto be removed or disengaged from the shaft 47. The housing 44 isprovided with a supplemental casing section 51 disposed at one side ofthe housing and extending at right angles to the collars 44, 44, or theaxis of the shaft 47 As shown in Fig. 4, a casing section 51 is disposedconcentric to a shaft 52, to which the worm 4G is splined, andco-operates with the housing 44 to enclose the worm and the adjacentportion of the worm gear 45. The upper portion of the casingl section 51is reduced to form a bearing 51 for one cX- tended end of a sleeve 53 towhich the worm with a collar 53:L which engages the bearings ,54 tosupport them in their seat. The lower free end of the sleeve 53 isprovided with screw threads to take a nut 55 which is tightened againstthe lower side of the bearings 54-to support them in engagement withthecollar 53 and -thus prevents movement of the sleeve relative to thebearings in an axial direction. The lower end of the casing section 51is anged, as shown at 5G,l and such flange is connected by cap Iscrews57 to which rotatably fits an opening 59 in an arm 60 formed integrallywith and depending from the platform 22aL of the knee 22, so that .whenthe knee 22 is adjusted vertically, n-the manner already described, itcarries with it the arm. 60 and the latter in turn carries with it thecasing section 51, bearings 54, the sleeve 53a, and the housing 44 sothat the head 23 and the housing 44 and eiemcnts supported thereby aremoved vertically as a unit. The collar 58 is formed with an axialopening through which the shaft 52 extends. The collar 58 is secured inthe opening 59 by an Aannular member 61 engaging the lower end section51 and elements associated therewith are mounted to swing or foradjustment about the axis of the shaft 52 (see dotted lines in Fig. 4a)to position the tool 4 at varying angles, this movement being permittedby the mounting of the collarv 58 in the opening 59 and the bearings 51and 54.

In Fig. 4ZL is shown means for clamping the head 23 in its adjustedposition. The clamping means preferably comprise a pluralitypf capscrews 23 fitting screw threaded openings in the knee platform 22"L andelongated openings 23d formed in the supporting element 23 of the head23 and through'which the cap screws extend. The openings 231 aresurrounded by upstanding walls 231, (integrally formed with the supporting element 23a) that form guides for the Shanks of the cap screws23c to engage. As shown in Fig. 4a, the heads of the screws overlap theend walls of the walls 23d', so that when they are tightened their headsserve to rigidly clamp the head l23 tothe platform 22a. The slots oropenings 23dr and upstanding walls 23d are curved on arcs struck fromthe axis of the shaft 52.

The shaft 52 is preferably formed in sections, indicated at 52CL and 52b(see Fig. 4). These sections 52a, 52h, are preferably secured togetherend to end by providing their adjoining ends with annular' flanges andsecuring such flanges together by cap screws 63. The section 52a ismounted in spaced bearings 64, 64, mounted in an auxiliary frame section65 and the base 1, respectively. The auxiliary frame section 65 isrigidly se` cured to the base 1c by cap screws 66 (see Fig. 7) at oneside of the section 1". The

v bearing 64a is preferably constructed to take thrust of the shaft 52,the races thereof being mounted in an annular recess formed in the base1c. The lower end of the shaft section 52u is reduced to form a shoulderagainst which a, bevel gear 67 is seated. The free end of the shaftsection is screw threaded to take a nut 68 which is tightened againstthe bearing 641L and through such bearing clamps the bevel gear 67against the shoulder. The upper end of the yshaft section 52b extendsthrough an opening formed in a hood 69 mounted at the front end of theadjacent rear side wall 2a, such opening being pro-4 vided with abushing 7 0 to form a bearing for the shaft section 52". The hood member69 has a body portion of cylindrical shape to house a worm gear 71 andan extended portion 72 into which the shaft section 52b extends, as justdescribe and carries within the extended portion 2 a worm 71fnl thatmeshes with the worm gear 71. The upper end of the extended hood portion72 is formed with an opening toreceive a cylindrical member 73 theopening in which forms an end bearing for that portion 'of the shaftsection 52 beyond the worm 71, a bushing 74 being preferably mountedwithin the cy lindrical member to provide the bearing referred to. 75indicates a sleeve element surrounding the shaft section 52b but withinthe drical member 7 3, the "flange being secured thereto by a pluralityof cap screws 77.

The auxiliary frame section 65 is provided with a laterally extendingwall 65EL which carries an annular plate 65b to which is secured acylindrical member 78. The outer end of the cylindrical member 78 isclosed and formed with an opening the wall of which has an inturned cupmember 79 which forms a seat for an anti-friction bearing 80. Thebearing 80 supports one endof a driving shaft 81. The opposite end ofthe shaft i 81 is mounted in a bearing 82 seated in an opening formed ina transverse wall 83 that is formed integrally with the Wallsof theauxiliary frame section 65. 84 indicates a bevel gear keyed to the innerend of the driving shaft 81 and meshing with the bevel gear 67. Thebevel gear 84 is disposed on one side of the bearing 82. At the oppositeside of the bearingI 82, the shaft 81 is provided with screw threads totake a nut 85, which is clamped against the bearing and clamps the bevelgear 84 between the head 86 provided on the inner end of the shaft andthe inner race of the bearing 82. The

bearing 80 is held in its seat by a cap member 87 which is secured tothe end wall of the cylindrical wall v78 by cap screws 88, 89, 90,indicate lose and fast pulleys, respectively, mounted on the shaft 81and each arranged to be driven by a belt 91 drivenin any desired manner.The side walls of the cylindrical member 78 are formed with suit-` ableopenings 92 through which the belt 91 extends. The annular flange forthe cylindrical member 78 is provided with a plurality of elongated4slots 7 8a through which the cap screws 7 8b extend, the elongatedslots permitting the cylindrical member 78 to be angularly adjusted toposition the openings 92 in line with the runs of the belt 91 (see Fig.2). The fast pulley 90 has an extended cylindrical section 93 whichforms a pulley for driving the forward .and reversev driving mechanismsindicatedV as an entirety at 94, 94, for rotating a feed screw 95 in adirection to feed the work A to the tool 4 and in the opposite directionyto return the work to starting position. The belt 91 may be shifted tothe fast pulley and from the latter to the loose pulley 89 in anydesired manner, such means preferably including an endWise movable rod96 slidably mounted in openings formed in the frame member 1a andcarrying at one end a pair of arms97 disposed at opposite sides of thebelt91. The rod 96 may be shifted in opposite directions in any desiredmanner, but preferably by the mechanism to be hereinafter described. Theouter portion of the driving shaft 81 1s reduced to form a shoulder 81aand such reduced portion is surrounded by rollers on which the hub ofthe loose pulley 89 rotates. The rollers and the hub of the loose pulley89 are held in position against the shoulder 81a by a collar 98, whichis held in position by a nut 99 engaging screw threads provided on thefree end of theI driving shaft 81, the bearing'80 being interposedbetween the nut and the collar so that the nut acts through the innerrace of the bearing and collar to hold the elements in position on thedriving` shaft' 81. lThe hubs for the fast pulley 90 and pulley 93 arespaced so that one may engage the nut 85 and the other a Washer seatedagainst the shoulder 81a and thus be held against endwise movement.

0f the driving mechanism 94', 100 indicates a transverse shaft mountedin spaced bearings 101 provided in an auxiliary frame section 102extending across and secured to one end of the frame 1a. The auxiliaryframe section 102 is shaped to provide suitable supporting walls for thebearings for the elements of the driving mechanisms as particularlyshown in Figs. 3 and 6 and the Walls of the frame 11 are shaped andproperly recessed to receive the supporting walls constituting theauxiliary frame section 102. The frame section 102-is provided withextended portions to overlap adjacent portions of the frame 1a (see Fig.6), so that the frame section 102 can be rigidly vclamped thereto by aplurality of cap screws 103 (see Fig. 5). 104 indicates a worm`interposed between suitable thrust bearings 105, 105, engaging theopposing end walls-surround ing the openings for the bearings 101 in theauxiliary frame 102, in which the transverse` shaft 100 is mounted. Toprevent endwise movement of the shaft 100, it is reduced to form ashoulder 106 which engages with the hub of the worm 104, which in turnengages the thrustbearing.,105" that is seated against the end wall ofthe ladjacent bearing 101. Endwise movement inthe opposite direction isprevented by a nut 107 tightened againstV a hub of the pulley 108 keyedto a reduced portion of the shaft 100, the hub being clamped by the nut107 against the shoulder 109 formed by'lsuch v.reduced portion. Thepulley 108 is in line with a portion of the pulley 93 and is driventherefromby a belt 110. The worm 104 meshes with a worm wheel 111 keyedtoa shaft" 112 which constitutes an extended portion of the feed screw95. The shaft 112 is mounted in a pair of spaced bearings 113,114provided in spaced Walls 102, 102", respectively, (see Fig. 6) of theauxiliary frame section 102. 115-115 indicates a pair of thrust bearingsinterposed between a collar 116 provided on the shaft 112 and the Wormwheel 111 and-the opposite end walls of the opening in the wall 102b forthe bearing 114 in which the shaft 112 is mounted. The worm wheel 111 ispreferably positioned on a reduced portion of the shaft 112. 118indicates va nut or clamping collar screw threaded upona screw threadedport-ion of the shaft, and serving to clamp the worm 111 against theadjacent thrust bearing 115 and coact-ing with the collar 116 to preventendwisc movement of the shaft in either direction. 119 indicates anarm`depending from the slide 6 and carrying at its lower end a nut 120through which the screw 95 extends. The nut 120 is preferably detachablyconnected to the lower lend of arm' 119 by a plurality of cap screws 121(see Fig. 7). From the foregoing descriptionit will be seen that thebelt 110 drives the -pulley 108 which is keyed to the shaft`10() and theshaft 100 through the worm 104 and worm wheel, 111, will drive the shaft112 and thus rotate the feed screw in one direction; since this drivingconnection is direct from the pulley 93 to the transverse shaft 100, thelatter is rotated at a relatively high speed and I utilize such speed tomove the slide 6 and through it the work A to starting posi.- tion, orin the direction reversed to that in which the work is fed to the tool4.

Themechanism 94 for feeding the work to the tool is preferablycorrelated to feed the work relatively slow and such elements comprisethe following instrumentalit-ies: 122 indicates a sleeve surrounding theshaft and suitably mounted inbearings formed in a tubular extension 102cformed integrally with the frame section 102. The sleeve 122 is providedwith an annular collar 123 which engages with a thrust bearing 124mounted in a recess 125 formed in the end wall of the tubular extension102 of the frame 102. The outer end of the sleeve 122f-is reduced toform a shoulder and such reduced end carries a pulley 126 which isinterposed between said shoulder and the hub of the pulley 108, beingheld against said shoulder thereby. The pulley 126 is keyed to thesleeve 122 so as to rotate it, and is disposed in line with a portionofthe pull-ey 93 so as to be driven by the belt 110 therefrom. As showni-n Fig. 3, the pulley 126 is disposed adjacent to and is of the samediameter as thc pulley 108, so that the belt 110 may be shifted from4the llatter pulley onto it to rotate the shaft 100 in the work feedingdirect-ion and vice versa position on the shaft by a nut 130. The gearv129 meshes with the change gear 131, fixed to a shaft 132, which ismounted in suitable bearings (not shown) provided in the frame section102, the gear 131\being removably secured on the outer end of the Shaft132 by a nut-131th The inner end of the shaft 132 carries a Worm 133which meshes with a worm Wheel 134 keyed to the hub of a clutch element135. The clutch element 135 is loosely mounted on a bushing -136surrounding the shaft' 100. 137 indicates a clutch element splined tothe Shaft100 and slidable thereon into engagement with the`clutchelement 135, such clutch element 137 being engaged by a yoke member 138which is operated to move the clutch element 137 into engagement withthe clutch element 135 .and out of engagementtherewith in the mannerhereinafter set forth.

140 indicates as an entirety separate means for rotating the shaft-10Qin either direction, wherebythe slide 6 and the work Ay may be manuallyadjusted on moved in either direction. Of these means, 141 indicates aclutch member keyed to a reduced portion provided on theouter end of theshaft 100. 142 indicates a clutch member slidably and rotatably fit-tingthe outer free Vend of the shaft 100 and movable into and out ofengagement with the 'clutch element 141. The 'clutch member 142 isformed with an annular groove into which projects the inner edges of arcshaped elements 143 secured to the end wall of the frame section 102 inwhich the outer bearing 101 is provided,-the groove being wide enough topermitendwise movement of the clutch element 142 into and out ofenga-gement with the clutch element 141. 144 indicates a` hand wheelsecured to the outer end 'of the clutch element 142, whereby it may berotated. By sliding the clutch element 142 inwardly on the shaft 100into engagement with the clutch element 141, the hand wheel 144 will beconnected tothe shaft 100 and `the latter may be rotated in eitherdirection. To maintain the clutch element 142 out of engagement with theclutch element 14]., I preferably enlarge the opening in the 'Wall 102surroundin the shaft and positioned therein a coiled'expansion spring142 abutting the end wall of theenlarged reeessand the enlargedbodyportionof the clutch element 142, so that the spring normally tends toslide the clutch element` 142 v.outwardly and thus maintain it out ofengagement with the clutch element 141. As

a result of this construction, the hand wheel' i 144 will remaininoperative While the shaft 100 is-being rota-ted in either direction by5a). The shaft 145 is provided with a co-l' lar 145a which engages oneend wall of t-he bearings 146 and with screw threads to take n'uts 1451,which may be tightened to engage the opposite end Wall of the bearing,thereby preventing endwise movement of the shaft. The hood 69 may beclosed by a removable cover plate 69a. The outer end of the shaft 145 ismounted in a pair of aligned bearings 147, provided in arms 6, 10',extending laterally from the slide 6 and the plate 10, respectively,shown in Fig. 5.'

The arms 6', 175, are form-ed with aligned openings to receive thebearings 147, through which 'the shaft 145 extends and yare also spacedto receive between the opposing end walls of the aligned openings thehub of the pinion v145, so that it will move endwise of the shaft 145with the slide 6 as the lat-ter is fed forwardly and rearwardly, in themanner already set forth.

148 indicates a plate mounted in the rear end of the arch member 2 andsecured there, to by a plurality of screws 149.

150 indicates as an entirety means` for clamping the knee 22 in itsadjusted position. -The clamping-means 150 preferably comprise a pair ofclamping elements 151, 151, and devices fory moving one element relativeto the other. For this purpose, one element (1511) is adjustably mountedin an opening 1d formed in the frame 1, whereas .an opening throughwhich extends a rod 152. The openingJ in tle clamping element 151 isscrew threaded and the free end of the rod is screw threaded to engage`therewith, so that by rotating vthe rod, as by a handle or lever 153,the element 151a will be moved toward the element `151 and thus clampthe knee between them.

If desired the change gears 129, 131, may be mounted in a casing,preferably comprising a mainv section 153, formed integrally platecarried thereby. 158 indicates an arm.

fixed to the inner end of the shaft l157 and pivotally connected to oneend of a rod 159. The opposite end of the rod 159 lis pivotallyconnected to a lever 160 that is connected to.

a second rock shaft 161, carrying the yoke 138 and operable to move thelatter'as already described. 162 indicates a handle connected to theouter end of a rod 163 which carries at its inner end a bifurcatedmember engaging the belt 110 (see Fig. 2). The rod 163 is mounted toslide endwise so that it may shift the belt 110 from the pulley 108 tothe pulley 126 and back again. 165 indicates a handle provided on theouter end of the rod 96 and adapted to move the rod' in eitherdirection, accordingly as the shaft 81 is to be stopped or started. 166indicates a rod slidably mounted at its opposite ends in bearing-sprovided in brackets 167, 168, carried by the adjacent side wall 21. 169indicate tappets, each adjustably fixed to the rod 166 and adapted to beengaged by a projection 170 carried by the slide 6 when the latter nearsthe ends of its movements so as to automatically stop the machine or thefeeding movement of the slide 6 in either direction. 171-171 indicatedevices, correlated with the rods 163 and 96 and controlled by themovement of the rod 166, adapted to release the rods and effect astopping of the machine automatically. As the construetion andarrangementof the stopping devices is not a part of my invention, adetail description thereof Will not be necessary. That is to say, to setthe machine in operation, the rods 163'and 96 are moved in one directionand set or locked by' the elements 171. The slide 6 then feeds forwardly or rearwardly until one of the collars or tappets 169 is engagedand moved by the projection 1.70, and acting therethrough moves the rod166. The rod in turn will aetuate the adjacent element 171 which willcause the release of the rods 163 and 96 and thus effecting a stoppingof the machine.

To those skilled in the art to which my invention relates many changesin construction and widely differing embodiments and applications of myinvention will suggest themselves without departing from the spiritand'seope thereof. My disclosures and the description herein are purelyillustrative and are not intended to be in any sense limiting. Forexample, while I have shown the tool arranged to be adjusted verticallyto engage the work piece and the arch arranged vertically above the workpiece to take the thrust thereof, the tool may be arranged tovertieally, a head supported by said knee,I

and swingable about the axis of said shaft, a tool spindle supported bysaid head and carrying a worm gear, a sleeve splined on said driven-shaft and provided with' a worm meshing with said worm gear, a workspi11- dle, connections between said work spindle and said driven shaft,means for adjustably securing said head to said knee, and means foradjusting said knee.

2. In apparatus of the character described, the combination of a frame,a driven shaft, a knee mounted in said frame to move vertically, a `headsupported by said knee, and-swingable about the axis of said shaft, atool spindle supported by said head and carrying a worm gear, a sleevesplined on said driven shaft and provided with a worm meshing` with saidworm gear, a work spindle, connections between said work spindle andsaid driven shaft, means for adjustably securing said head to .saidknee, and means for adjusting said knee, said adjusting means comprisinga wedge engaging said knee.

3. In apparatus of the character described, the combination of a frame,a driven shaft, a knee carried by .said frame, a head 'supported by saidknee, and swingable about the axis of said shaft,- a tool spindlesupported by said head and carrying a worm gear, a sleeve splined onsaid driven shaft and provided with a worm meshing with said worm gear,a work spindle, connections between said work spindle and said drivenshaft, and means for adjustably securing said head to said knee and afly-wheel on said tool spindle.

4'. In apparatus of the class described, the combination of a frame, aframe member disposed above said frame and having side walls andstandards spaced from said side walls and supported upon and secured tothe opposite ends ofesaid frame, a knee support- -ed intermediate the.ends of saidl frame be# tween said standards and said Iside walls ofsaid frame member, a slide movably supported between and guided by said,frame and frame member., 4a.work spindle supported by said slide, ashaft mounted in said" frame, la head mounted on said knee/to swingabout the axis of said shaft, a tool spindle mounted on said head, gearconnections b etween said tool :spindle and shaftv carried by said head,drivmgconnections between said work spindle and said shaft, and meansfor feeding said slide forwardly and rear' wa'rdly.

5. In apparatus of the class described, the combination of a frame, a.frame member disposed above said frame and having side walls andstandards spaced from said side walls and supported upon and secured tothe opposite ends of said frame, a knee supportlo ed intermediate theends of said frame between said standards and said side walls of saidframe member, a\slide movably sup` ported between and guided by saidframe and frame member, a work spindle supported by said slide, a shaftmounted in said frame, ahead mounted on said knee to swing about theaxis of said shaft, a tool spindle mounted on said head, gearconnections between said toolspindle and shaft carried by said head,driving connections between said work spindle and said shaft, means forfeeding said slide forwardly and rearwardly,

and means for adjusting said knee to move said head relative to the workon said work spindle.

6. In apparatus of the class described, the combination of a frame, aframe member disposed above said frame and having side walls andstandards spaced from said side walls and supported upon and secured tothe opposite ends of saidframe, a knee supported intermediate the endsof said frame between said standards and said side walls vof said framemember, a slide movably supported between and guided by said frame andframe member, a work spindle supported by said slide, a shaft mounted'insaid frame, a head mounted on -said knee to swing about the axis ofsaid. shaft, a tool 40 spindle mounted on said head, gear connec-l tionsbetween said tool spindle and shaft carried by said head, drivingconnections between said work spindle and said shaft, means for feedingsaid slide forwardly and rearwardly, and a wedge engaging said knee andserving to adjust it and the tool carry-v ing head relative to the workon said work spindle. 'I

. 7. In apparatus of the class described, the

50 combination of a frame, a frame member disposed above `said frame andhaving side walls and standards spaced from said side walls andsupported upon and secure to the opposite ends of said `frame, a kneesupported intermediate theends ofsaid frame between said" standards and`said sidel walls Iof said frame member', a slide movably sup- \portedbetween and guided' by said frame andframe member., a 'work spindlesupen ported'by said slide, a shaft mounted in Vsaid frame, a headmounted on said knee to( swing about the axjs of said shaft, a toolspindle mounted on said head, gear connections between said 'toolspindle `and shaft carried by said head, driving connections 'wardlyextending guides on sai between said work spindle and said shaft, `meansfor feeding Asaid slide forwardly and rearwardly, means for adjustingsaid knee to move said head relative to the work on said Work spindle,and means carried by said slide for supporting the work spindle beyondthe work carried thereby.

8. In apparatus of the class described, the combination of a frame, aframe member disposed above said frame and having side walls andstandards spaced from said side walls and supported upon and secured tothe opposite ends of said frame, a knee supported intermediate the endsof said frame betweensaid standards and said side walls of said framemember, guides carried by said frame and frame member, the vguides onsaid frame member extending forwardly to a point above said knee, aslide engaging said guides and having an extension to engage theforwardly extending guides on said frame member, a work spindle on theslide, a shaft mounted in said frame', a head mounted on said knee toswing about the axis of said shaft, a tool spindle mounted on said head,gear connections between said tool spindle and shaft carried by saidhead, driving connections between said work spindle and' said shaft,means for feeding said slide forwardly and rearwardly. 95

9. In apparatus of the class described, the j combination of a frame, aframe member disposed above said frame and having side walls andstandards spaced -from said side walls and supported upon and secured tothe o posite ends of sa' frame, a knee supporte intermediate the ends ofsaid frame between said 'standards and said side walls of said framemember, guides carried by said frame and frame member, the guides onsaid frame member extending forwardly to a point above said knee, aslide engaging said guides and having an extension to en gage thelforframe member, a work spindle on the slide, al shaft mounted in saidframe, a head mountedA on said knee to swing about the axis of saidshaft, a tool spindle mounted o n said head, gear connections betweensaid tool spindle and shaft carried by said head, driving connect-ionsbetween said work spindle and saidv shaft, means for feeding saidslideforwardly and rearwardly, and means carried by said extension forsupporting the work spindle beyond the work carriedthereby. 126) 10. Inapparat-us of the class described, the combination of a frame havingupper and lower guides arranged with one substantially vertically abovethe other, a reeiprocable slide disposed between and engaging saidguides, a work spindle rotatably earned by 'said slide and adaptedtosupport a wor piece substantially in the plane of the guides, a toolspindle mounted on said frame, a work tool on the tool spindle inposition to y per element and the arch, a movable member engage a workpiece on the work spindle'and yexert thrust thereon substantially in thedi- 'slide disposed between and engaging said guides, a work spindlerotatably carried by the slide and adapted to supportal work piecesubstantially in the plane ofthe guides, a tool spindle mounted on theframe, a work tool on the tool spindle in position to engage the workpiece and exert thrustv thereon subst-antially in the direction of theupper guide, means for moving said slide to feedthe work to the tool,the .upper guide being extended to a point above the work piece, andmeans for rotating the work spindle and tool spindle.

12. In apparatus of the class described in combination, a frame, a framearch structurally integral therewith, a work piece element and a `worktool element under the arch, one above the other and adaptedrespectively to support a work piece and a work tool, a rigid memberbetween the upprovided with an inclined surface for moving the lowerelement into working position relative to the upper element in which thetool and 'work piece may engage each other,"

and a moving member provided with `an inclined surface adapted tocooperate with the inclined surface of the movable member for forciblymoving the movable member.

arch and above the tool, and a rigid member extending from the slide andmovable there-` with to engage the free end of the work spindle.

14;. In apparatus of the class described in combination, a frameincluding a frame arch structurally integral therewith, a tool spindle,a tool on the spindle under the arch, a reciprocable slide, a guide forthe slide on the arch, a work spindle on the slide adapted to movetherewith and support a work piece under the arch and above the tool,and a rigid member extending from the slide and movable .therewith toengage` the work spindle.

15. In apparatus of the class described in combination, a frameincluding a frame arch structurally integral therewith, a tool spindle,a tool on the spindle under the arch, a reciprocable slide, a guide forthe slide on `the arch, a work spindle on the slide adapted to movetherewith, having a free end adapted to support a work piece under thearch and above the tool, a rigid member extending from the slide andmovable therewith to engage the free end of the work spindle to transfertothe arch the thrust of a work piece when in working engagement with.the work tool.

16. In apparatus of the class described in combination, a frameincluding a frame arch structurally integral therewith, a kneeadjustable vertically'on the frame, a tool spin- .dle, onl the knee, atool on the tool spindle under the arch, a reciprocable slide, a guidefor the slide on the arch, a work spindle on the slide adapted to movetherewith and to support a work piece under the arch and above the tool,av rigid member extending from the slide and movable therewith to engagethe work spindle and to transfer tothe arch the thrust of a work piecewhen the tool is moved by the-knee into working engagement therewith.

17. In apparatus of the class described, the combination of a frameincluding a frame arch structurally inte ral therewith, a reciprocableslide on the frame, a guide for the slide on the arch; a work spindle onthe slide adapted to support a work piece, a tool spindle on the frame,a Atool on the tool spindle ,in position to engage a work piece, theguide, slide, work spindle and work tool being so arranged that thedirection of thrustof the work spindle; when a work piece thereon isengaged wit-h the work tool, 1s along a line passing through the guideand into the arch.

18. In apparatus of the class described in combination, a frameincluding a frame arch structurally integral therewith, a knee guide aknee adapted to slide on the guide an having an inclined face, a toolspindle on the knee, a tool on the tool spindle under the arch, a workspindle adapted to support a work piece under the a-rchand above the vtool, a movable member having an inclined face engaging the inclinedface of the knee, means for moving the movableV member to adjust theknee on the guidato bring the tool into working engagement with a workpiece and rigidly hold it in said position, a rigid member engaging thework spindle and adapted to transfer tothe archthe thrust of the workspindle when the work tool is in working engagement with a work p'ieceon the spindle.

19. In apparatus ofthe classwescribed in combination, a frame includinga frame arch structurally integral therewith, a knee guide,

a knee adapted to slide on the guide and' having an inclined face,a'reciprocable slide onthe frame, a'guide for the slide 'on the' isoarch, a work spindle on the slide adapted to support a Work piece, arigid member on the slide movable therewith and engaging the workspindle, a tool spindle on the knee, a tool on the tool spindle forengaging the work piece, a movable member having an inclined faceengaging the inclined face of the knee, means i'or moving the movablemember to adjust the knee on the guide to bring the tool into Workingengagement with the work iece and rigidly hold it in said position, t eslide, the guide therefor, the work spindle and the work tool and rigidmember being so arranged that the directionof thrust of the workspindle,l when the tool is in Working engagement with the Work piecethereon, is along a line through the slide guide and into the arch.

20. In apparatus of the class described in combination, a frame, a workspindle adapted to support a Work piece, a tool spindle and a toolthereon. means for rotating the spindles, spindle adjusting means forbringing the tool into working position relative to a work piece saidadjusting means including a knee by which one of the spindles issupported, guides on the frame within and on which' the knee is slidablymounted, an inclinedl surface on the knee, a movable member on the framehaving a corresponding inclined surface engaging the inclined surface onthe knee, and means for moving the movable member.

21. In apparatus of the class described in combination, a frameincluding a frame arch, a knee guide, a knee adapted to be movedadjustably on the guide and having an inclined face, a movable kneejadjusting member on the frame having -a corresponding inclined faceengaging the inclined face of the knee, means for moving the movablemember to adjust the knee on the guide, a head on the knee, a rotatable"tool spindle on the head adaptedto sup ort a tool, a Worm wheel on thespindle, a riving shaft, a worm on the driving shaft meshing with saidworm wheel for driving the tool spindle, the head being adjustable onthe knee about the axis of the driving shaft, a rotatable work spindleadapted to support a work piece, a supplemental shaft, a Worm wheel onthe supplemental shaft, a worm on Vthe driving 'shaft meshing therewithfor driving the supplemental shaft, driving connections between thesupplemental shaft and 'work spindle 'for driving the work spindle,

a reciprocable slide adapted to carry and rigidly support the rotatablework spindle, a guide for the slide on the frame, the knee, the head,tool spindle, work spindle, slide guide and arch being so aligned thatthe knee may be adjusted to forcibly engage the tool with the work pieceand that the direction of the resultant thrust of the work spindle willbe along a line through the slide and guide into the arch.

22. In apparatus of the class described, a main frame, a slidereciprocatably mounted on-the frame, a work spindle extending out of theslide, supported thereon, and adapted to support a work piece on itsfree end, a tool spindle on the frame, a tool on the tool spindle belowthe work piece, operative mechanism to move the tool into engagementwith the work piece to work it thereby exerting a thrust on the workpiece having a large component vertically upward, a guide for the slidein a horizontal plane below the work spindle, a guide for the slide in ahorizontal plane above the work spnd'le, the slide havring an extensionthereon. movable therewith,

arranged in the general direction of the work spindle, and slidablysupported on said upper guide, a structural frame member rising from themain frame and carrying said upper guide, and a rigid strut memberdepending from said slide extension and supportingly engaging the freeend of the work spindle and adapted to transmit said thrust into saidslide extension and thence through said upper guide into said framemember.

23. In apparatus of the class described, I

a main frame, a slide reciprocatably mounted on the frame, a workspindle extending out of the slide, supported. thereon, and adapted tosupport a work piece on its free end, a tool spindle on the frame, atool on the tool spindle below the work piece, operative mechanism tomove the tool into engagement with the work piece to work it therebyexerting a thrust onthe work piece having a large -component verticallyupward, a\guide for the slide in a horizontal plane below theworkspindle, a guide for the slide in a horizontal plane above the workspindle, the slide having an extension thereon, movable therewith,arranged in the general direction of the work spindle, and slidf ablysupported on said'upper' guide, a structural frame member rising fromthe main frame and carrying said up er guide, and a rigid strut memberdepen ing from'said slide `extension and supportingly engaging the freeend of the work spindle and adapted lto transmit said thrust4 into vsaidslide extension and *thence through said upper guide into said framemember, the strut member being slidably movable on said slide extensionin a direction parallel to said work spindle. i v` 24. In vapparatusofthe class described, a main frame, a slide reciprocatably mounted onthe frame, a work s indleextending ont of the slide, supported tl;support a work piece'on its'free end, a t001 spindle on the frame, atool on the tool spindle below the work piece, operative i mechanism tomove the tool into.engage ment with the Work piece to work it therebyexerting a thrust on the work piece having a large component verticallyupward, a guide for the slide, a second guide for the slide in ahorizontal plane above the Work spindle, the slide having an extensionthereon, movable therewith, arranged in the general direction of thework spindle, and slidably supported on said upper guide, a structuralframe member rising from the main frame and carrying said upper guide,and `a rigid strut member dependingxfroin said yslide extension andsupportingly engaging the free end oi' the work spindle and adapted totransmit said thrust into said slide extension vand thence through saidupper guide into anism to move the tool into engagement with the workpiece to work it thereby exerting a thrust on the work piece having alarge component vertically upward, a guide for the slide, a secondguidefor the slide in a horizontal plane above the work spindle, l

tension and supportingly engaging the free end of lthe work spindle-andadapted to transmit said thrust into said'slide extension and thencethrough said upper guide into said frame member, the strut member beingslidably movable on said slide extension in a direction parallel to saidwork spindle. Y

In testimony' whereof, I have hereunto subscribed my name.

CHARLES H. SCHURR.

